Selector for automatic telephone-exchanges.



B. SETTEGAS T. SELECTOR FOR AUTOMATIC TELEPHONE EXCHANGES.

APPLICATION FILED DEO HI, 1911.

Patented Sept. 10,1912

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7 IIIIIIIIIIIIIIIIIIL- such groups of three contacts each. of contacts are so arranged in multiple sets 35 UNITED STATES PATENT OFFIGE.

BERNHARD SETTEGAST, 0F KARLSHOBST, NEAR BERLIN, GERMANY, ASSIGNOB DEUTSCHE TELEPHONWERKE G. LLB; 15., OF BERLIN, GERMANY.

SELECTOR FOR AUTOMTIC TELEIHONE-EXCHANGES.

1,038,213. Original application filed May 23, 1910,

To all whom it may concern:

Be it known that I, BERNIIARD Snr'rnoas'r, engineencitizen of Germany, and resident of Karlshorst, near Berlin, Germany, have invented certain new and, useful Improvements in Selectors for Automatic Telephonenew and improved arrangement. of the fixed contact sets with which the well known movable contact arms cooperate.

In the Strowger system there is a special set of fixed contacts provided for each contact arm of the switch cylinder over which the contact arms pass, that is to say, the A- conductor, the B-conductor which both lead to the subscriber, and the testing conductor which only leads to the office, are connected to separate contact sets. If a fault occurs in any one line or if a line is to be cut off the necessary operations have to be carried out in all three contact sets of the selector. In place of this the contacts ofthe A-, B- and corresponding testing-conductors are arranged together in the new selector. For example a set of contacts is formed by ten The sets of ten for example in the standards of the selector that they are easily accessible from the rear and can also be removed and-exchanged in a very simple manner.

One form of construction is shown in the accompanying drawing, in which Fi ure 1 is a front view and Fig. 2 asec tiona view online 2 2 with certain parts broken away. I

24, 25, 26 are contact arms -which for instance are supposed as fixed to a toothed bar 19 adapted to be lifted and turned by electromagnets (not shown). The bar 19 has two end disks 1? 18 sliding loosely on a fixed upright bar 15. The latter passes late 1, on which the movthrough the base or the toothed bar 19 are ing mechanisms mounted.

The sets of-contacts, only one of which is indicated in the figures, consist for example of Specification 0! Letters ratent.

division from my earlier The lower Patented Sept. 10, 191 2.

Serial No. 562,924. Dividedand this application files. Ilecemberl, 1911. Serial 110. 663,844. r

ten groups eachoot three contacts 69, 70, 71. Each contact (Fig. 2) consists of a strip,

end, while the inner end of each stripprojects inward a little beyond the lates F2, 73, about to be described, and is a apted to be engaged by theend of one of the contact springs 24', 25, 26. The contact pieces 39, 70, 71, are separated from one another and from the supporting plates 72, 7 3, by means of intermediate layers of insulating mate'- rial. Thesupporting plates 72, 7 3, are held together either by rivets, or )etter by means of lugs 74 stamped out of one plate and passed through corresponding slots the other plate and then bent over at their late 7 3 is only made so long as is necessary or holdingthe co tacts 69, 70, 71,

but the ends of the upper pla' e 72 are formed as lugs 75 which are thrust frointhe rear into slots 76in the standards 2 (Fi 2). These standards consist of stamped sheet metal shaped as tubes with extended footpieces at each end. When the required nuns bersay tenof the plates 7 2 carrying the sets of contacts have been inserted in the standards, bars 77 are thrust into the hollow standards from'above, thus locking the plates 72 in position, as seen in Fig. 2. The standards 2 are so arranged that they will each take the lugs 75 of the contact sets of two adjacent selectors.

As is evident from the preceding'description and the'drawin'gs, all the'parts of the new contact sets are so formed that they can be made entirely by machinery, that is. to say, they need no subsequent finishing by hand. They all consist of stamped and, in some cases, b'ent sheet material'which can be made at the same time with the necessary holes for receiving the various screws, pins and the like. I i-consequence of this, the new selector is not only very easily made,but costs very little.

i I ciaim:- 1. In afselector for automatic telephone exchanges a plurality of cont-act sets, each set comprising a row ofgroups, and each group consisting of a pluralit of cotirdinate contacts, standards holding said contact sets in such a manner, that each set can be exchanged independentl from the others, substantially asdescri ed.

.with the usual soldering eyelet at its outer ion 2. In a selector for automatic teiplibns exchanges a plurality of contact sets, each set comprising a row of groups, and each group consisting of two speaking and a testing contact. standards holding said contact sets in sue 1 a manner, that each set can be exchanged independently from the others, substantially as described.

In a. selector for automatic telephone exchanges a plurality of contact sets, each set comprising a row of groups, and each group consisting of a plurality of coordinate contacts, each set of contacts being held together by means of two plates with the insertion f intermediate insulating layers, siandards holding said contact sets in such a manner, that each set can be exchanged independently from the others, substantially as described.

4. In a selector for automatic telephone exchanges a plurality of separately interchangeable contact sets, each set comprising a row of groups, and each group consisting o1. a plurality of coordinate contacts, each set of contacts being held together by means of two plates with the insertion of intermediate insulating layers, lugs stamped out from one of said plates, slots stamped out in the other of said plates, said lugs passing through. and being bent over said slots, substantially as described.

5. In selector for automatic telephone exchanges a plurality or" separately interchangeable contact sets, each set comprising a row of groups, and each group consisting oi a plurality of coiirdinate contacts, each set of contacts being held together by means of two plates With the insertic of intermediate insulatin layers, standards with transverse slots a apted to receive the ends of one of said plates, substantially. as described.

6. In a selector for automatic telephone exchanges a plurality of separately interchangeable contact sets, each set comprising a row of groups, and each group consisting of a plurality of coordinate contacts, each set of cont-acts being held together by means of two plates with the-insertion of intermediate insulating layers, standards of stamped and rolled sheet having transverse slots to receive the ends of one 01? said plates, substantially as described.

7. In a selector for automatic telephone exchanges a plurality of separately interchangeable contact sets, each set comprising a row of groups, and each group consisting of a plurality of coordinate cont-acts, each set of contacts being held together by means of two plates with the insertion of intermediate insulating layers, standards of stamped and rolled sheet having slots to re ceive the ends of one of said plates, and bars to be inserted from above in each standard and adapted to hold the ends of the contact sets in position, substantially as described.

In Witness whereof, I have hereunto signed my name this 16th day of November, 1911, in the presence of two subscribing witnesses.

BERNHARD SETTEGAST.

ii HAsrnn, Wot mun HAUPT. 

